[PATCH] D26331: [AVX-512] Add lowering to cvttpd2udq/cvttps2udq for fptoui v2f64/2f32 to 2i32

[Craig Topper via llvm-commits]

craig.topper created this revision.
craig.topper added reviewers: RKSimon, delena, zvi.
craig.topper added a subscriber: llvm-commits.

This patch adds support for fptoui to 2i32 from both 2f64 and 2f32, building on Simon's change for the signed version in r284459 and using AVX-512 instructions.

If we don't have VLX support we need to use a 512-bit operation for v2f64->v2i32 and extract the result.

It also recognises that cvttpd2udq zeroes the upper 64-bits of the xmm result.


https://reviews.llvm.org/D26331

Files:
  lib/Target/X86/X86ISelLowering.cpp
  lib/Target/X86/X86ISelLowering.h
  lib/Target/X86/X86InstrAVX512.td
  lib/Target/X86/X86InstrFragmentsSIMD.td
  lib/Target/X86/X86IntrinsicsInfo.h
  test/CodeGen/X86/vec_fp_to_int.ll

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